Ferry route data
Position 4
![](/media/wripwxw2/fr-p4-01.png)
![Figure 'a': Monthly mean surface temperature and salinity for the entire duration of the record at the station which are derived from simple averaging of all the monthly data.](/media/jtykxdej/fr-p4-02.png)
Figure 'a': Monthly mean surface temperature and salinity for the entire duration of the record at the station which are derived from simple averaging of all the monthly data.
![](/media/fh0nfkjw/fr-p4-03.png)
![Figure 'b': Monthly climatic average with the first standard deviation. The standard deviation has been derived from the difference in the monthly average from the long-term mean (1971 - 2000).](/media/pptf415d/fr-p4-04.png)
Figure 'b': Monthly climatic average with the first standard deviation. The standard deviation has been derived from the difference in the monthly average from the long-term mean (1971 - 2000).
![](/media/nfookpfg/fr-p4-05.png)
![Figure 'c': Yearly anomaly from the base period. Where the average base period (1971 - 2000) has been subtracted from the average annual temperature and salinity. The standard deviation of the annually averaged temperature and salinity of the entire record is also shown. A trend line derived from a linear least squares analysis has been added to indicate the extent to which annual changes are linear.](/media/4jjn5ehp/fr-p4-06.png)
Figure 'c': Yearly anomaly from the base period. Where the average base period (1971 - 2000) has been subtracted from the average annual temperature and salinity. The standard deviation of the annually averaged temperature and salinity of the entire record is also shown. A trend line derived from a linear least squares analysis has been added to indicate the extent to which annual changes are linear.